9 6 
PHARMACEUTICAL BOTANY 
suit, “The Comparative Morphology, Taxonomy and Distribution 
of the Myricaceas of the Eastern United States” by Youngken in 
U. of Pa. Library.) 
Fig. 40. — Tubercular clusters on underground stem and roots of Myrica Mac- 
farlanei observed by the author at North Wildwood, N. J., Jan. 31, 1915. 
THE BUD 
Buds are short young shoots with or without rudimentary leaves 
(bud scales) compactly arranged upon them. 
The plumule represents the first bud on the initial stem or caulicle. 
Scaly buds are such as have their outer leaf rudiments transformed 
into scales; there are often coated with a waxy or resinous substance 
without and a downy lining within, to protect them from sudden 
changes in climate. Buds of this character are common among 
shrubs and trees of temperate regions. 
Naked buds are those which are devoid of protective scales. 
They are common to herbaceous plants. 
